This rewrites some more code to use GraphAssembler methods instead of
manually creating and adding the nodes. To this end, we add three more
methods to the GraphAssembler: UintPtrConstant, ProtectedStore, and
ProtectedLoad.

R=ahaas@chromium.org, tebbi@chromium.org

Bug: v8:10123
Change-Id: I825137d4355d117d88e29063ab2ac68340883f77
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2445512
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70338}